Real-Time Air Quality
Intelligence for Smarter Traffic
AI-powered NO₂ monitoring and predictive forecasting that gives traffic managers the data to reduce roadside pollution in real time.
Smarter Sensors, Smarter Data
The XA Series of air quality monitors combine advanced electrochemical gas sensors with AI-driven digital signal processing. Sampling at 200 times per second and cross-referencing 26 environmental variables, our sensors deliver reference-grade accuracy at a fraction of the cost of chemiluminescence stations — mounted directly onto traffic signal infrastructure with no excavation and no ongoing site visits.
The Air Quality Challenge
Local authorities face growing pressure to monitor and reduce roadside pollution, but traditional approaches are expensive, slow and limited in coverage. Reference stations cost tens of thousands per site. Low-cost sensors drift and need constant recalibration. Neither approach gives you the real-time, junction-level intelligence you need to take action.
The XA Series solves this by combining the accuracy of reference instruments with the cost and deployment speed of low-cost sensors — and adds AI prediction that lets you act before pollution peaks, not after.
AI-Powered Signal Processing
Raw electrochemical sensor readings are inherently noisy. Our AI engine samples at 200 times per second, cross-references temperature, humidity, and 24 other environmental variables, and applies machine-learned calibration models to extract a clean, stable signal.
The result is 5 ppb resolution from a sensor that costs a fraction of a chemiluminescence analyser — with no consumables, no site visits, and a 5-year operational life.
- Dual sensors for cross-validation and drift detection
- AI auto-calibration — no manual recalibration needed
- 200 samples per second digital signal processing
- 26 environmental variables factored in real-time
- Matches reference station accuracy at 1/10th the cost
Key Capabilities
Every XA sensor includes these capabilities as standard
Reference-Grade Accuracy
5 ppb resolution with dual-sensor cross-validation. AI auto-calibration maintains accuracy over the full 5-year sensor life without site visits.
AI Prediction & Forecasting
Xan AI predicts pollution levels up to 60 minutes ahead, enabling proactive traffic management strategies before pollution peaks occur.
Real-Time Connectivity
3G, 4G, WiFi, Bluetooth, LoRa, ZigBee, and Mesh connectivity. Data feeds directly into UTMC, Yunex, Swarco and third-party city platforms.
Rapid Deployment
Mount on existing traffic signal infrastructure in under 30 minutes. No excavation, no power supply works, no planning permission.
Networked Auto-Calibration
Sensors calibrate against each other across the network using Xan AI, maintaining accuracy without manual intervention for up to 5 years.
Policy-Ready Data
Cloud Manager and API provide real-time dashboards, alerts, historical analysis, and data exports ready for AQMA reporting and Clean Air Zone enforcement.
Proven in the Field: Staffordshire Live Labs
In Newcastle-under-Lyme, NOW Wireless deployed XA sensors as part of the Staffordshire Live Labs project with Staffordshire County Council, Amey, Keele University and the Connected Places Catapult.
The system used AI to predict pollution an hour ahead and implemented special traffic gating plans via the TMS system. The result: NO₂ spikes outside a care home on the inner ring road were flattened, while journey times for drivers were maintained.
- AI prediction triggered proactive traffic gating
- NO₂ spikes flattened at the target care home
- Journey times maintained for drivers
- Integration with Swarco TMS system
XA Series — Core Sensors
Three sensor configurations to match your monitoring requirements
XA-REF
- Dual NO₂ and Class 1 Laser Particle Sensor
- PM1, PM2.5, PM4.25, PM10
- Two high-sensitivity gas sensors (NO₂, NO, CO, SO₂, O₃, H₂S, Cl₂)
- Additional gas sensors can be added without limit
- 200 samples per second / 20s–20min reporting
- AI auto-calibration and forecasting
- 5-year maintenance-free operation
- Supports Yunex and Swarco City Managers
XA-NO2
- 200 samples/second AI digital processing
- AI and statistical pollution profiling
- Auto-calibration extends life up to 5 years
- Real-time pollution data for AI prediction
- Resolution 10 ppb, augmented to 5 ppb
- Range 5 ppb to 20,000 ppb
XA-OPS
- PM1, PM2.5, PM4.25, PM10
- Reporting 20 seconds to 20 minutes
- Temperature and humidity measurement
- AI-driven auto-calibration and forecasting
- 5-year maintenance-free operation
- Supports Yunex and Swarco City Managers
XA Series — Additional Gas Sensors
Extend your monitoring network with dedicated single-gas sensors
XA-NO
- Range 10 ppb to 20,000 ppb (19–38,000 µg/m³)
- Response time < 40 seconds
- AI forecasts and alerts (Xan AI)
- Networked auto-calibration
- -30°C to 50°C / 15–90% humidity
- 3G, 4G, WiFi, Bluetooth, LoRa, ZigBee, Mesh
XA-SO2
- Range 5 ppb to 10,000 ppb (13–27,500 µg/m³)
- Response time < 40 seconds
- AI forecasts and alerts
- Networked auto-calibration
- -30°C to 50°C / 15–90% humidity
- 3G, 4G, WiFi, Bluetooth, LoRa, ZigBee, Mesh
XA-CO
- Range 10 ppb to 1,000,000 ppb (12–1,205,000 µg/m³)
- Response time < 40 seconds
- AI forecasts and alerts (Xan AI)
- Networked auto-calibration
- -30°C to 50°C / 15–90% humidity
- 3G, 4G, WiFi, Bluetooth, LoRa, ZigBee, Mesh
XA Series vs. Traditional Monitoring
How our AI-powered sensors compare to conventional approaches
| Capability | Reference Station | Low-Cost Sensor | XA Series |
|---|---|---|---|
| Accuracy | High (reference grade) | Low (drifts over time) | ✓ Reference-grade via AI |
| Cost per site | £40,000+ | £500–£2,000 | ✓ Fraction of reference cost |
| Calibration | Manual, quarterly | Manual, frequent | ✓ AI auto-calibration |
| Site visits | Regular servicing | Regular recalibration | ✓ None for up to 5 years |
| Deployment time | Weeks / planning required | Hours | ✓ Under 30 minutes |
| Predictive capability | None | None | ✓ AI prediction up to 60 min |
| Network coverage | 1–2 sites per town | More sites but unreliable | ✓ Dense, reliable network |
| Traffic integration | No | No | ✓ Direct UTC / UTMC / TMS feed |
| Particulate monitoring | Separate instrument | Basic | ✓ PM1, PM2.5, PM4.25, PM10 |
| Operational life | Ongoing maintenance | 6–12 months before drift | ✓ 5 years maintenance-free |
Integrates with Your Existing Infrastructure
XA sensors are designed to work within your existing traffic and city management ecosystem. Data feeds directly into UTMC, Yunex, Swarco, and third-party platforms via Cloud Manager and API — no middleware, no custom integration projects.
- UTMC compliant
- Yunex and Swarco city manager compatible
- Cloud Manager with real-time dashboards
- Open API for third-party integration
- Alerts, reports and data export
- Crown Commercial Service approved supplier
See what your junctions are breathing
Whether you're managing an AQMA, delivering an Air Quality Action Plan, or integrating air quality into your traffic management strategy — NOW Wireless gives you the real-time intelligence to make it happen.
Request a Demo View Case StudyCrown Commercial Service Approved Supplier
